Arkel Signature V Urban Pannier: The redesign SIGNATURE V is a waterproof laptop bike pannier (Vertical style design) made for urban bike travel. This pannier is made with sturdy 1000 denier US-made Cordura nylon so you know it is built to last. A TPU laminated internal nylon liner with fully taped seams ensures 100% waterproofness. The SIGNATURE V is equipped with the best pannier mounting system in the bike business, i.e. our patented Cam-Lock attachment system. The super strong and fully adjustable aluminum hooks will safely and securely hold your laptop and gear on your rack. This pannier is handmade in Canada and signed by its maker.